Cita APA (7th ed.)

Krommenhoek, W., Sebus, J., & Van Esch, G. J. (1980). Biological structures. University Park Press.

Cita Chicago (17th ed.)

Krommenhoek, W., J. Sebus, i G. J. Van Esch. Biological Structures. Baltimore: University Park Press, 1980.

Cita MLA (9th ed.)

Krommenhoek, W., et al. Biological Structures. University Park Press, 1980.