Cita APA

(1971). Historical abstracts: Bibliography of the world's historical literature 21.1975. Historical abstracts.

Citación estilo Chicago

"Historical Abstracts: Bibliography of the World's Historical Literature 21.1975." Historical Abstracts 1971.

Cita MLA

"Historical Abstracts: Bibliography of the World's Historical Literature 21.1975." Historical Abstracts, 1971.