Gaya APA

Gutmann, J, L., Dumsha, T, C. (2006). Problem Solving in Endodontics Prevention, Indentification, and Management (4th edition). Missouri: Mosby Elsevier.

Gaya MLA

Gutmann, James, L.., Dumsha, Thom, C.. "Problem Solving in Endodontics Prevention, Indentification, and Management". 4th edition Missouri: Mosby Elsevier, 2006. Text.