APA

Ostenfeld C., Paulsen O., . (1922). A list of flowering plants from Inner Asia. Copenhagen: .

Chicago

Ostenfeld C.h, Paulsen O, . 1922. A list of flowering plants from Inner Asia. Copenhagen: .

Harvard

Ostenfeld C., Paulsen O., . (1922). A list of flowering plants from Inner Asia. Copenhagen: .

MLA

Ostenfeld C.h, Paulsen O, . A list of flowering plants from Inner Asia. Copenhagen: . 1922.