APA (7th ed.) Citation

Spoel, S. v. d. (1967). Euthecosomata. A group with remarkable developmental stages. (Gastropoda, Pteropoda) By S. van der Spoel. [Illus. by S. van der Spoel].

Chicago Style (17th ed.) Citation

Spoel, S. van der. Euthecosomata. A Group with Remarkable Developmental Stages. (Gastropoda, Pteropoda) By S. Van Der Spoel. [Illus. by S. Van Der Spoel]. Gorinchem, J. Noorduijn, 1967.

MLA (9th ed.) Citation

Spoel, S. van der. Euthecosomata. A Group with Remarkable Developmental Stages. (Gastropoda, Pteropoda) By S. Van Der Spoel. [Illus. by S. Van Der Spoel]. 1967.