Cita APA (7a ed.)
Ingham, F. G. The proofs, essays, sample, specimen and test stamps of Mexico.
Cita Chicago Style (17a ed.)
Ingham, Frederick G. The Proofs, Essays, Sample, Specimen and Test Stamps of Mexico.
Cita MLA (9a ed.)
Ingham, Frederick G. The Proofs, Essays, Sample, Specimen and Test Stamps of Mexico.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.