Cita APA (7a ed.)
Scott Publishing Co, Snee, C., Kloetzel, J. E., & Houseman, D. Specialized Catalogue of United States Stamps and Covers: 2015 (Nonagésima tercera edición.).
Cita Chicago Style (17a ed.)
Scott Publishing Co, Charles Snee, James E. Kloetzel, 与 Donna Houseman. Specialized Catalogue of United States Stamps and Covers: 2015. Nonagésima tercera edición.
Cita MLA (9a ed.)
Scott Publishing Co, et al. Specialized Catalogue of United States Stamps and Covers: 2015. Nonagésima tercera edición.
警告：这些引文格式不一定是100％准确.