APA (7th ed.) Citation

Thonner, F. (1981). Thonner's analytical key to the families of flowering plants (Transl. and rev. ed. d. Ausg. Berlin, 1917.). PUDOC.

Chicago Style (17th ed.) Citation

Thonner, Franz. Thonner's Analytical Key to the Families of Flowering Plants. Transl. and rev. ed. d. Ausg. Berlin, 1917. Wageningen: PUDOC, 1981.

MLA (9th ed.) Citation

Thonner, Franz. Thonner's Analytical Key to the Families of Flowering Plants. Transl. and rev. ed. d. Ausg. Berlin, 1917. PUDOC, 1981.