GONZÁLEZ, C., ORNELAS, J. F., & JIMÉNEZ, L. (2004). Between-year Changes in Functional Gender Expression of Palicourea padifolia (Rubiaceae), a Distylous, Hummingbird-pollinated Shrub. Ann Bot.
Chicago-tyylinen lähdeviittausGONZÁLEZ, CLEMENTINA, JUAN FRANCISCO ORNELAS, ja LEONOR JIMÉNEZ. "Between-year Changes in Functional Gender Expression of Palicourea Padifolia (Rubiaceae), a Distylous, Hummingbird-pollinated Shrub." Ann Bot 2004.
MLA-viiteGONZÁLEZ, CLEMENTINA, JUAN FRANCISCO ORNELAS, ja LEONOR JIMÉNEZ. "Between-year Changes in Functional Gender Expression of Palicourea Padifolia (Rubiaceae), a Distylous, Hummingbird-pollinated Shrub." Ann Bot 2004.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.