Gaya APA
Gibbs, Nancy, Duffy, Michael. (2012).
The Presidents Club: Inside the World's Most Exclusive Fraternity .
New York:
Simon and Schuster Paperbacks.
Gaya Chicago
Gibbs, Nancy, Duffy, Michael.
The Presidents Club: Inside the World's Most Exclusive Fraternity.
New York:
Simon and Schuster Paperbacks,
2012.
Buku.
Gaya MLA
Gibbs, Nancy, Duffy, Michael.
The Presidents Club: Inside the World's Most Exclusive Fraternity.
New York:
Simon and Schuster Paperbacks,
2012.
Buku.
Gaya Turabian
Gibbs, Nancy, Duffy, Michael.
The Presidents Club: Inside the World's Most Exclusive Fraternity.
New York:
Simon and Schuster Paperbacks,
2012.
Buku.