APA

Keller R., . (1996). Identification of tropical woody plants in the absence of flowers and fruits : a field guide. Basel: Birkhäuser.

Chicago

Keller Roland, . 1996. Identification of tropical woody plants in the absence of flowers and fruits : a field guide. Basel: Birkhäuser.

Harvard

Keller R., . (1996). Identification of tropical woody plants in the absence of flowers and fruits : a field guide. Basel: Birkhäuser.

MLA

Keller Roland, . Identification of tropical woody plants in the absence of flowers and fruits : a field guide. Basel: Birkhäuser. 1996.