Gaya APA

Smith, J., Brogan, C. (2012). The Impact Equation (Cet. 1, 2012). England: Pengin Gruop.

Gaya MLA

Smith, Julien., Brogan, Christhoper. "The Impact Equation". Cet. 1, 2012 England: Pengin Gruop, 2012. Art Original.