Citazione Stile APA (7a Edizione)

Langridge, D. W. (1976). Classification and indexing in the humanities. Butterworths.

Citazione stile Chigago Style (17a edizione)

Langridge, Derek Wilton. Classification and Indexing in the Humanities. London: Butterworths, 1976.

Citatione MLA (9a ed.)

Langridge, Derek Wilton. Classification and Indexing in the Humanities. Butterworths, 1976.