Cita APA (7th ed.)

Eastwood, B. (1979). Directory of audio-visual sources: History of science, medicine, and technology. Science History Publications.

Cita Chicago (17th ed.)

Eastwood, Bruce. Directory of Audio-visual Sources: History of Science, Medicine, and Technology. New York: Science History Publications, 1979.

Cita MLA (8th ed.)

Eastwood, Bruce. Directory of Audio-visual Sources: History of Science, Medicine, and Technology. Science History Publications, 1979.