APA (7th ed.) Citation

Andersen, A. O. (1923). The first forty lessons in harmony. Birchard.

Chicago Style (17th ed.) Citation

Andersen, Arthur Olaf. The First Forty Lessons in Harmony. Boston: Birchard, 1923.

MLA (9th ed.) Citation

Andersen, Arthur Olaf. The First Forty Lessons in Harmony. Birchard, 1923.

Warning: These citations may not always be 100% accurate.