APA (7th ed.) Citation

Flügel, J. G. (1840). A series of commercial letters (3rd ed.). J. Klinkhardt.

Chicago Style (17th ed.) Citation

Flügel, J. G. A Series of Commercial Letters. 3rd ed. Leipsic: J. Klinkhardt, 1840.

MLA (9th ed.) Citation

Flügel, J. G. A Series of Commercial Letters. 3rd ed. J. Klinkhardt, 1840.