Specimina XII generum cinchonae et palicureae --.

MLA

Martins, K. F. P., August Wilhelm Eichler and I. Urban. Specimina XII generum cinchonae et palicureae --. [Place of publication not identified] : [publisher not identified], [1915]

APA

Martins, K., Eichler, A. & Urban, I. (1915). Specimina XII generum cinchonae et palicureae --. [Place of publication not identified] : [publisher not identified].

Chicago

Martins, K. F. P., August Wilhelm Eichler and I. Urban. Specimina XII generum cinchonae et palicureae --. Edited by August Wilhelm Eichler and I. Urban. [Place of publication not identified] : [publisher not identified], [1915]