Παραπομπή σε μορφή APA (7η εκδ.)

Smith, R. C. (1850). English grammar on the productive system: A method of instruction recently adopted in Germany and Switzerland : designed for schools and academies. W.T. Truman.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Smith, Roswell Chamberlain. English Grammar on the Productive System: A Method of Instruction Recently Adopted in Germany and Switzerland : Designed for Schools and Academies. Cincinnati: W.T. Truman, 1850.

Παραπομπή σε μορφή MLA (8th εκδ.)

Smith, Roswell Chamberlain. English Grammar on the Productive System: A Method of Instruction Recently Adopted in Germany and Switzerland : Designed for Schools and Academies. W.T. Truman, 1850.