APA (7th ed.) Citation

Darby, H. H. (1940). Symmetry in normally asymmetrical Crustacea. [publisher not identified].

Chicago Style (17th ed.) Citation

Darby, Hugh Hackland. Symmetry in Normally Asymmetrical Crustacea. Washington: [publisher not identified], 1940.

MLA (9th ed.) Citation

Darby, Hugh Hackland. Symmetry in Normally Asymmetrical Crustacea. [publisher not identified], 1940.