APA

Sommella A., SPSS, . (2009). <The >incisal edge. Markham: Palmeri Publishing.

Chicago

Sommella Attilio, SPSS, . 2009. <The >incisal edge. Markham: Palmeri Publishing.

Harvard

Sommella A., SPSS, . (2009). <The >incisal edge. Markham: Palmeri Publishing.

MLA

Sommella Attilio, SPSS, . <The >incisal edge. Markham: Palmeri Publishing. 2009.