Cita APA (7a ed.)

Crum, H. (2001). Structural diversity of bryophytes. University of Michigan Herbarium.

Cita Chicago Style (17a ed.)

Crum, Howard. Structural Diversity of Bryophytes. Ann Arbor: University of Michigan Herbarium, 2001.

Cita MLA (9a ed.)

Crum, Howard. Structural Diversity of Bryophytes. University of Michigan Herbarium, 2001.