Cita APA (7th ed.)

McKain, M. R., & Johnson, M. G. (2020). Plant systematics. Excelic Press.

Cita Chicago (17th ed.)

McKain, Michael R., i Matthew G. Johnson. Plant Systematics. Lewes, Delaware: Excelic Press, 2020.

Cita MLA (9th ed.)

McKain, Michael R., i Matthew G. Johnson. Plant Systematics. Excelic Press, 2020.