Cita APA (7th ed.)

Harrison, R. E., & Harrison, C. R. (1972). Trees and shrubs ([Rev. ed.].). A. H. & A. W. Reed.

Cita Chicago (17th ed.)

Harrison, Richmond E., i Charles Richmond Harrison. Trees and Shrubs. [Rev. ed.]. Wellington: A. H. & A. W. Reed, 1972.

Cita MLA (8th ed.)

Harrison, Richmond E., i Charles Richmond Harrison. Trees and Shrubs. [Rev. ed.]. A. H. & A. W. Reed, 1972.