Gaya APA

Ballinger, P, W., Frank, E, D. (1999). Merril`s Atlas Radiographic Positions and Radiologic Procedures volume one (ninth edition) (ninth). St louis: Mosby Elsevier.

Gaya MLA

Ballinger, Philip, W., Frank, Eugene, D. "Merril`s Atlas Radiographic Positions and Radiologic Procedures volume one (ninth edition)". ninth St louis: Mosby Elsevier, 1999. Text.