Thompson, R. C., Doolittle, S. P., & Caffrey, D. J. (1964). Growing pumpkins and squashes (slightly revised.). U.S. Department of Agriculture.
Chicago-Zitierstil (17. Ausg.)Thompson, Ross C., S. P. Doolittle, und D. J. Caffrey. Growing Pumpkins and Squashes. slightly revised. Washington, DC: U.S. Department of Agriculture, 1964.
MLA-Zitierstil (9. Ausg.)Thompson, Ross C., et al. Growing Pumpkins and Squashes. slightly revised. U.S. Department of Agriculture, 1964.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.