Cita APA (7th ed.)

Bernstein, R., & Bernstein, S. (1989). 3000 solved problems in biology. McGraw-Hill.

Cita Chicago (17th ed.)

Bernstein, Ruth, i Stephen Bernstein. 3000 Solved Problems in Biology. New York: McGraw-Hill, 1989.

Cita MLA (9th ed.)

Bernstein, Ruth, i Stephen Bernstein. 3000 Solved Problems in Biology. McGraw-Hill, 1989.