APA (7th ed.) Citation

GUTH, H. P., & SHNIDER, P. S. (1981). Our world today. D.C. Heath.

Chicago Style (17th ed.) Citation

GUTH, Hans P., and Patricia S. SHNIDER. Our World Today. Lexington: D.C. Heath, 1981.

MLA (9th ed.) Citation

GUTH, Hans P., and Patricia S. SHNIDER. Our World Today. D.C. Heath, 1981.