APA (7th ed.) Citation

Lorenzen, J. A. (1971). 20 years of Analog/Astounding science fiction-science fact, 1952-1971. Locomotive Workshop.

Chicago Style (17th ed.) Citation

Lorenzen, Jan A. 20 Years of Analog/Astounding Science Fiction-science Fact, 1952-1971. Avon Lake, OH: Locomotive Workshop, 1971.

MLA (9th ed.) Citation

Lorenzen, Jan A. 20 Years of Analog/Astounding Science Fiction-science Fact, 1952-1971. Locomotive Workshop, 1971.

Warning: These citations may not always be 100% accurate.