Cita APA (7a ed.)

Pennington, D. R. (2012). Indexing and retrieval of non-text information. De Gruyter.

Cita Chicago Style (17a ed.)

Pennington, Diane Rasmussen. Indexing and Retrieval of Non-text Information. Berlin: De Gruyter, 2012.

Cita MLA (8a ed.)

Pennington, Diane Rasmussen. Indexing and Retrieval of Non-text Information. De Gruyter, 2012.