Cita APA (7th ed.)
Levin, L. M., & Grekulinski, E. (1965). The Book of popular science. Grolier.
Cita Chicago (17th ed.)
Levin, Lawrence M., i Edmund Grekulinski. The Book of Popular Science. New York: Grolier, 1965.
Cita MLA (9th ed.)
Levin, Lawrence M., i Edmund Grekulinski. The Book of Popular Science. Grolier, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.