Cita APA (7th ed.)

Harrar, E. S., & Harrar, J. G. (1962). Guide to southern trees (2a. ed.). Dover.

Cita Chicago (17th ed.)

Harrar, Ellwood Scott, i Jacob George Harrar. Guide to Southern Trees. 2a. ed. Nueva York: Dover, 1962.

Cita MLA (9th ed.)

Harrar, Ellwood Scott, i Jacob George Harrar. Guide to Southern Trees. 2a. ed. Dover, 1962.