Παραπομπή σε μορφή APA (7η εκδ.)

Seligman, E. R. A. 1. (1894). Progressive taxation in theory and practice. American Economic Association.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Seligman, Edwin Robert Anderson 1861. Progressive Taxation in Theory and Practice. [Baltimore]: American Economic Association, 1894.

Παραπομπή σε μορφή MLA (9th εκδ.)

Seligman, Edwin Robert Anderson 1861. Progressive Taxation in Theory and Practice. American Economic Association, 1894.