APA (7th ed.) Citation

Ralph, E. K., & Ackerman, R. E. (1961). University of Pennsylvania Radiocarbon Dates IV. Radiocarbon, 3, 4.

Chicago Style (17th ed.) Citation

Ralph, Elizabeth K., and Robert E. Ackerman. "University of Pennsylvania Radiocarbon Dates IV." Radiocarbon 3 (1961): 4.

MLA (9th ed.) Citation

Ralph, Elizabeth K., and Robert E. Ackerman. "University of Pennsylvania Radiocarbon Dates IV." Radiocarbon, vol. 3, 1961, p. 4.

Warning: These citations may not always be 100% accurate.