APA (7e ed.) Bronvermelding

Williams, R. D., & Hanks, s. H. (1976). Hardwood Nurseryman's guide. U.S.Department of agriculture.

Chicago (17e ed.) Bronvermelding

Williams, Robert D., en sidney H. Hanks. Hardwood Nurseryman's Guide. Washigton: U.S.Department of agriculture, 1976.

MLA (9e ed.) Bronvermelding

Williams, Robert D., en sidney H. Hanks. Hardwood Nurseryman's Guide. U.S.Department of agriculture, 1976.