APA (7th ed.) Citation

Martin, B. (1975). A mushroom is growing: A little nature book. Encyclopaedia Britannica Educational Corporation.

Chicago Style (17th ed.) Citation

Martin, Bill. A Mushroom Is Growing: A Little Nature Book. Chicago, Ill.: Encyclopaedia Britannica Educational Corporation, 1975.

MLA (9th ed.) Citation

Martin, Bill. A Mushroom Is Growing: A Little Nature Book. Encyclopaedia Britannica Educational Corporation, 1975.