Gaya APA
Sheldon, D. (2010).
Sophie Pitt-Turnbull Discover America .
Haupapauge, New York, AS.:
PT Gramedia Pustaka Utama.
Gaya MLA
Sheldon, Dyan.
"Sophie Pitt-Turnbull Discover America".
Haupapauge, New York, AS.:
PT Gramedia Pustaka Utama,
2010.
Text.