APA (7th ed.) Citation

McCormick, M. (1971). Who-what-when-where-how-why made easy: A guide to the practical use of reference books. Quadrangle Books.

Chicago Style (17th ed.) Citation

McCormick, Mona. Who-what-when-where-how-why Made Easy: A Guide to the Practical Use of Reference Books. Chicago: Quadrangle Books, 1971.

MLA (9th ed.) Citation

McCormick, Mona. Who-what-when-where-how-why Made Easy: A Guide to the Practical Use of Reference Books. Quadrangle Books, 1971.