APA (7th ed.) Citation

Spoel, S. v. d. (1976). Pseudothecosomata, Gymnosomata and Heteropoda: (Gastropoda). Bohn, Scheltema, Holkema.

Chicago Style (17th ed.) Citation

Spoel, Siebrecht van der. Pseudothecosomata, Gymnosomata and Heteropoda: (Gastropoda). Utrecht: Bohn, Scheltema, Holkema, 1976.

MLA (9th ed.) Citation

Spoel, Siebrecht van der. Pseudothecosomata, Gymnosomata and Heteropoda: (Gastropoda). Bohn, Scheltema, Holkema, 1976.

Warning: These citations may not always be 100% accurate.