Fritsch, F. E., & Salisbury, E. Manual of Plants.
Cita Chicago (17th ed.)Fritsch, F. E., i E.J Salisbury. Manual of Plants.
Cita MLA (9th ed.)Fritsch, F. E., i E.J Salisbury. Manual of Plants.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)