APA način citiranja (7. izdanje)

Johnston, I. M. (1929). Contributions from the Gray Herbarium of Harvard University. Harvard University.

Čikaški stil citiranja (17. izdanje)

Johnston, Ivan M. Contributions from the Gray Herbarium of Harvard University. Cambridge: Harvard University, 1929.

MLA način citiranja (9. izdanje)

Johnston, Ivan M. Contributions from the Gray Herbarium of Harvard University. Harvard University, 1929.