APA引文

Christensen, C. (1973). Index filicum. Otto Koeltz Antiquariat.

Chicago Style (17th ed.) Citation

Christensen, Carl. Index Filicum. Koenigstein: Otto Koeltz Antiquariat, 1973.

MLA引文

Christensen, Carl. Index Filicum. Otto Koeltz Antiquariat, 1973.

警告：這些引文格式不一定是100％准確.