Cita APA (7th ed.)

Wallece, R. A. (1981). Biology The World Of Life (3 ed.). s.n.

Cita Chicago (17th ed.)

Wallece, Robert A. Biology The World Of Life. 3 ed. Dallas: s.n, 1981.

Cita MLA (9th ed.)

Wallece, Robert A. Biology The World Of Life. 3 ed. s.n, 1981.