Cita APA (7th ed.)

Britannica Corporation. (1990). Human beings [motion pictures]: The digestive systems; the work of the heart. Encyclopedia Britannica Educational Corp.

Cita Chicago (17th ed.)

Britannica Corporation. Human Beings [motion Pictures]: The Digestive Systems; the Work of the Heart. Chicago: Encyclopedia Britannica Educational Corp, 1990.

Cita MLA (9th ed.)

Britannica Corporation. Human Beings [motion Pictures]: The Digestive Systems; the Work of the Heart. Encyclopedia Britannica Educational Corp, 1990.