APA (7th ed.) Citation

Heit, M., & Shortreid, A. (1991). GIS applications in natural resources. GIS World.

Chicago Style (17th ed.) Citation

Heit, Michael, and Art Shortreid. GIS Applications in Natural Resources. Fort Collins, Colo.: GIS World, 1991.

MLA (9th ed.) Citation

Heit, Michael, and Art Shortreid. GIS Applications in Natural Resources. GIS World, 1991.

Warning: These citations may not always be 100% accurate.