Cita APA

Encyclopaedia Britannica Educational Corporation, & Encyclopaedia Britannica Educational Corporation. (1976). Learning about light (2. edición --.). Chicago, III.: Encyclopaedia Britannica Educational Corp.

Citación estilo Chicago

Encyclopaedia Britannica Educational Corporation, y Encyclopaedia Britannica Educational Corporation. Learning About Light. 2. edición --. Chicago, III.: Encyclopaedia Britannica Educational Corp, 1976.

Cita MLA

Encyclopaedia Britannica Educational Corporation, y Encyclopaedia Britannica Educational Corporation. Learning About Light. 2. edición --. Chicago, III.: Encyclopaedia Britannica Educational Corp, 1976.