APA (7th ed.) Citation

Bloom, W. W., & Krekeler, C. H. (1963). General biology: A unified text manual. Van Nostrand.

Chicago Style (17th ed.) Citation

Bloom, William Whiley, and Carl H. Krekeler. General Biology: A Unified Text Manual. Princeton, N. J: Van Nostrand, 1963.

MLA (9th ed.) Citation

Bloom, William Whiley, and Carl H. Krekeler. General Biology: A Unified Text Manual. Van Nostrand, 1963.