APA (7th ed.) Citation

Haefner, J. W. (1975). Generative grammars that simulate ecological systems. University Microfilms International.

Chicago Style (17th ed.) Citation

Haefner, James Welt. Generative Grammars That Simulate Ecological Systems. Ann Arbor: University Microfilms International, 1975.

MLA (9th ed.) Citation

Haefner, James Welt. Generative Grammars That Simulate Ecological Systems. University Microfilms International, 1975.