Cita APA (7th ed.)

Oram, R. F. (1976). Biology: Living systems (2a. ed.). Charles E. Merrill.

Cita Chicago (17th ed.)

Oram, Raymond F. Biology: Living Systems. 2a. ed. Columbus: Charles E. Merrill, 1976.

Cita MLA (9th ed.)

Oram, Raymond F. Biology: Living Systems. 2a. ed. Charles E. Merrill, 1976.