APA-Zitierstil (7. Ausg.)

Bowles, O. (1918). The structural and ornamental stones of Minnesota. US Gov. Print. Off.

Chicago-Zitierstil (17. Ausg.)

Bowles, Oliver. The Structural and Ornamental Stones of Minnesota. Washington, D.C: US Gov. Print. Off, 1918.

MLA-Zitierstil (9. Ausg.)

Bowles, Oliver. The Structural and Ornamental Stones of Minnesota. US Gov. Print. Off, 1918.