Broekel, R. (1982). Aquariums and Terrariums, Chicago: Childrens Press.
Butzow, C.M. and Butzow, J.W. (1989). Science Through Children's Literature, Colorado: Teacher Ideas Press.
California State Department of Education. (1990). Science framework for California public schools kindgarten through grade twelve. Sacramento: Office of State Printing.
Lowery, L.F. (1985). The Everyday Science Sourcebook, Dale Seymour Publications.
Project Learning Tree. (1993). American Forest Foundation.
Project WILD. (1996). Counsel for Environmental Education.
Baker, L. (1992). Life in the oceans, New York: Scholastic Inc.
McCauley, J.R. (1986). Animals that live in trees. Washington D.C.: National Geographic Society.
Meadows, G. (1991). Animal Friends. Aukland: Shortland Publications.
Meadows, G. (1991). Animal sanctuaries. Aukland: Shortland Publications.
Meadows, G. (1991). Extinction is forever. Aukland: Shortland Publications.