Citazione APA

Ellwood S Harrar, Fred M White, & William M Harlow. (1979). Text book of Dendrology (6th.). McGraw- hill book company.

Stile di citazione Chicago

Ellwood S Harrar, Fred M White, e William M Harlow. Text Book of Dendrology. 6th. New York: McGraw- hill book company, 1979.

Citazione MLA

Ellwood S Harrar, et al. Text Book of Dendrology. 6th. McGraw- hill book company, 1979.