Cita APA (7th ed.)

HEIMLER, C. H., DANIEL, L., & LOCKARD, J. D. (1984). Focus on life science. Charles E. Merrill.

Cita Chicago (17th ed.)

HEIMLER, Charles H., Lucy DANIEL, i J. David LOCKARD. Focus on Life Science. Columbus: Charles E. Merrill, 1984.

Cita MLA (9th ed.)

HEIMLER, Charles H., et al. Focus on Life Science. Charles E. Merrill, 1984.