APA (7e ed.) Bronvermelding

Kupchella, C. I., & Kupchella, C. I. (1986). Environmental Science: Living Within System Of Nature / Charles E. Kupchella. Allyn and Bacon.

Chicago (17e ed.) Bronvermelding

Kupchella, Charles I., en Charles I. Kupchella. Environmental Science: Living Within System Of Nature / Charles E. Kupchella. Allyn and Bacon, 1986.

MLA (8e ed.) Bronvermelding

Kupchella, Charles I., en Charles I. Kupchella. Environmental Science: Living Within System Of Nature / Charles E. Kupchella. Allyn and Bacon, 1986.