Gaya APA

Guttman, Burton S. & Hopkins III, Johns W.. (1983). Understanding Biology (-). New York: Harcourt Brace Jovanovich.

Gaya Chicago

Guttman, Burton S. & Hopkins III, Johns W.. Understanding Biology. - New York: Harcourt Brace Jovanovich, 1983. Text.

Gaya MLA

Guttman, Burton S. & Hopkins III, Johns W.. Understanding Biology. - New York: Harcourt Brace Jovanovich, 1983. Text.

Gaya Turabian

Guttman, Burton S. & Hopkins III, Johns W.. Understanding Biology. - New York: Harcourt Brace Jovanovich, 1983. Print.