Cita APA (7a ed.)

Campbell, D. H. (1897). A morphological study of Naias and Zannichellia.

Cita Chicago Style (17a ed.)

Campbell, Douglas Houghton. A Morphological Study of Naias and Zannichellia. California-USA, 1897.

Cita MLA (8a ed.)

Campbell, Douglas Houghton. A Morphological Study of Naias and Zannichellia. 1897.