APA Style

RITCHIE, D. DONALD. (1979). BIOLOGY . : .

Chicago Style

RITCHIE, D. DONALD. BIOLOGY. : , 1979. Buku.

MLA Style

RITCHIE, D. DONALD. BIOLOGY. : , 1979. Buku.

Turabian Style

RITCHIE, D. DONALD. BIOLOGY. : , 1979. Buku.