Παραπομπή σε μορφή APA (7η εκδ.)

Keller, R. (2004). Identification of tropical woody plants in the absence of flowers and fruits: A field guide (Second edition.). Birkhèauser Verlag.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Keller, Roland. Identification of Tropical Woody Plants in the Absence of Flowers and Fruits: A Field Guide. Second edition. Basel: Birkhèauser Verlag, 2004.

Παραπομπή σε μορφή MLA (9th εκδ.)

Keller, Roland. Identification of Tropical Woody Plants in the Absence of Flowers and Fruits: A Field Guide. Second edition. Birkhèauser Verlag, 2004.