Cita APA (7th ed.)
Holden Thorp, P. A Guide to Stamp Collecting: America's favorite family hobby.
Cita Chicago (17th ed.)
Holden Thorp, Prescott. A Guide to Stamp Collecting: America's Favorite Family Hobby.
Cita MLA (9th ed.)
Holden Thorp, Prescott. A Guide to Stamp Collecting: America's Favorite Family Hobby.
Atenció: Aquestes cites poden no estar 100% correctes.