APA (7th ed.) Citation

Spence, J., & Richards, O. W. (1940). Native cellulose in the ascidian Phallusia nigra. [publisher not identified].

Chicago Style (17th ed.) Citation

Spence, J., and Oscar W. Richards. Native Cellulose in the Ascidian Phallusia Nigra. Washington: [publisher not identified], 1940.

MLA (9th ed.) Citation

Spence, J., and Oscar W. Richards. Native Cellulose in the Ascidian Phallusia Nigra. [publisher not identified], 1940.