Cita APA (7a ed.)

Purdum, J. (1990). The first book of harvard graphics. del autor.

Cita Chicago Style (17a ed.)

Purdum, Jack. The First Book of Harvard Graphics. Carmel: del autor, 1990.

Cita MLA (8a ed.)

Purdum, Jack. The First Book of Harvard Graphics. del autor, 1990.