APA

Molau U., . (1988). Scrophulariaceae-part. New York, New York, United States: The New York Botanical Garden.

Chicago

Molau Ulf, . 1988. Scrophulariaceae-part. New York, New York, United States: The New York Botanical Garden.

Harvard

Molau U., . (1988). Scrophulariaceae-part. New York, New York, United States: The New York Botanical Garden.

MLA

Molau Ulf, . Scrophulariaceae-part. New York, New York, United States: The New York Botanical Garden. 1988.