APA (7th ed.) Citation

Weisz, P. B., & Keogh, R. N. j. a. (1977). Elements of biology. G.M.S.

Chicago Style (17th ed.) Citation

Weisz, Paul B., and Richard N. joint auth Keogh. Elements of Biology. Quezon City: G.M.S, 1977.

MLA (9th ed.) Citation

Weisz, Paul B., and Richard N. joint auth Keogh. Elements of Biology. G.M.S, 1977.