APA-Zitierstil (7. Ausg.)

Andros, S. O. (1914). Mining practice in district I (Longwall). State Geological Survey, Univ. of Illinois.

Chicago-Zitierstil (17. Ausg.)

Andros, S. O. Mining Practice in District I (Longwall). Urbana, Ill: State Geological Survey, Univ. of Illinois, 1914.

MLA-Zitierstil (9. Ausg.)

Andros, S. O. Mining Practice in District I (Longwall). State Geological Survey, Univ. of Illinois, 1914.