Cita APA (7a ed.)

Gaskell, P. (1972). A New introduction to bibliography. Clarendon Pr.

Cita Chicago Style (17a ed.)

Gaskell, Philip. A New Introduction to Bibliography. Oxford: Clarendon Pr, 1972.

Cita MLA (9a ed.)

Gaskell, Philip. A New Introduction to Bibliography. Clarendon Pr, 1972.