APA

Croizat Chaley L., .Check list of colombian and presumed colombian Cactacea. : .

Chicago

Croizat Chaley León, .Check list of colombian and presumed colombian Cactacea. : .

Harvard

Croizat Chaley L., .Check list of colombian and presumed colombian Cactacea. : .

MLA

Croizat Chaley León, .: . .