Cita APA (7th ed.)
Harmsen, L. (1939). Studies on the embryology and cytology of Saxifraga. Reitzel.
Cita Chicago (17th ed.)
Harmsen, Louis. Studies on the Embryology and Cytology of Saxifraga. København: Reitzel, 1939.
Cita MLA (9th ed.)
Harmsen, Louis. Studies on the Embryology and Cytology of Saxifraga. Reitzel, 1939.
Atenció: Aquestes cites poden no estar 100% correctes.