APA

Taylor C. M., Zappi D. C., . (2006). Flora of Ecuador : 162. Rubiaceae (part 5) Tribe 18. Psychotrieae (2) / Charlotte M. Taylor, Daniela Zappi. Goteborg: University of Goteborg. Departament of Systematic Botany; Gunnar Harling; Persson.

Chicago

Taylor Charlotte M, Zappi Daniela C, . 2006. Flora of Ecuador : 162. Rubiaceae (part 5) Tribe 18. Psychotrieae (2) / Charlotte M. Taylor, Daniela Zappi. Goteborg: University of Goteborg. Departament of Systematic Botany; Gunnar Harling; Persson.

Harvard

Taylor C. M., Zappi D. C., . (2006). Flora of Ecuador : 162. Rubiaceae (part 5) Tribe 18. Psychotrieae (2) / Charlotte M. Taylor, Daniela Zappi. Goteborg: University of Goteborg. Departament of Systematic Botany; Gunnar Harling; Persson.

MLA

Taylor Charlotte M, Zappi Daniela C, . Flora of Ecuador : 162. Rubiaceae (part 5) Tribe 18. Psychotrieae (2) / Charlotte M. Taylor, Daniela Zappi. Goteborg: University of Goteborg. Departament of Systematic Botany; Gunnar Harling; Persson. 2006.