Cita APA (7th ed.)

Dittmann, H., & Hardy, J. (2000). Learn Library of Congress classification. DocMatrix.

Cita Chicago (17th ed.)

Dittmann, Helena, i Jane Hardy. Learn Library of Congress Classification. Canberra: DocMatrix, 2000.

Cita MLA (9th ed.)

Dittmann, Helena, i Jane Hardy. Learn Library of Congress Classification. DocMatrix, 2000.