- 2020. Hills, J.W. (2010). O upu
muamua i le Tala i le
Lalolagi mo e ua
faatoa aʻoaʻoina u lea mataupu:
Elementary Geography. Nabu Press. Page 62. ISBN 9781147952896...
- 2010. Hills, J.W. (2010). O upu
muamua i le Tala i le
Lalolagi mo e ua
faatoa a'oa'oina u lea mataupu: Elementary Geography. Nabu Press. Page 60. ISBN 9781147952896...
- hours. Hills, J.W. (2010). O upu
muamua i le Tala i le
Lalolagi mo e ua
faatoa a'oa'oina u lea mataupu: Elementary Geography. Nabu Press. Page 62. ISBN 9781147952896...
- (link) Hills, J.W. (2010). O upu
muamua i le Tala i le
Lalolagi mo e ua
faatoa a'oa'oina u lea mataupu: Elementary Geography. Nabu Press. Page 63. ISBN 9781147952896...
- 2005. Hills, J.W. (2022). O Upu
Muamua I Le Tala I Le
Lalolagi Mo E Ua
Faatoa A'oa'oina U Lea Mataupu.
Legare Street Press. Page 63. ISBN 9781019136812...
- 2012. Hills, J.W. (2010). O upu
muamua i le Tala i le
Lalolagi mo e ua
faatoa a'oa'oina u lea mataupu: Elementary Geography. Nabu Press. Page 59. ISBN 9781147952896...
- ISBN 9783770176946. Hills, J.W. (2010). O upu
muamua i le Tala i le
Lalolagi mo e ua
faatoa a'oa'oina u lea mataupu: Elementary Geography. Nabu Press. Page 59. ISBN 9781147952896...
- ISBN 9780030779251 Hills, J.W. (2010). O upu
muamua i le Tala i le
Lalolagi mo e ua
faatoa a'oa'oina u lea mataupu:
Elementary Geography. Nabu Press. Page 63. ISBN 9781147952896...
- Activities". Hills, J.W. (2010). O upu
muamua i le Tala i le
Lalolagi mo e ua
faatoa aʻoaʻoina u lea mataupu: Elementary Geography. Nabu Press. Page 46. ISBN 9781147952896...
- 2022. Hills, J.W. (2022). O Upu
Muamua I Le Tala I Le
Lalolagi Mo E Ua
Faatoa A'oa'oina U Lea Mataupu.
Legare Street Press. Page 61. ISBN 9781019136812...