APA-ийн эшлэл(7 дахь хэвлэлт)

WILLIAMS, G. A., BOLEN, M. C., & DOERHOFF Ray B. (1973). Challenges to science physical science. Wbster Division, McGraw-Hill Book Company.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

WILLIAMS, George A., Max C. BOLEN, ба DOERHOFF Ray B. Challenges to Science Physical Science. New York: Wbster Division, McGraw-Hill Book Company, 1973.

MLA -ийн эшлэл (9 дэх хэвлэлт)

WILLIAMS, George A., et al. Challenges to Science Physical Science. Wbster Division, McGraw-Hill Book Company, 1973.