APA (7th ed.) Citation

Siele, J. A., & Hacker, G. (1977). Teaching science at a distance. International Extension College.

Chicago Style (17th ed.) Citation

Siele, John Arap, and Gerry Hacker. Teaching Science at a Distance. Cambridge, Engl: International Extension College, 1977.

MLA (9th ed.) Citation

Siele, John Arap, and Gerry Hacker. Teaching Science at a Distance. International Extension College, 1977.