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.
警告：这些引文格式不一定是100％准确.