(1957). Orchidaceae neotropicales, ii: De orchidaceis principaliter colombianis notulae.
Chicago Style (17th ed.) CitationOrchidaceae Neotropicales, Ii: De Orchidaceis Principaliter Colombianis Notulae. 1957.
MLA (8th ed.) CitationOrchidaceae Neotropicales, Ii: De Orchidaceis Principaliter Colombianis Notulae. 1957.
Warning: These citations may not always be 100% accurate.