APA (7th ed.) Citation

Williams, L. N. (1990). Fundamentals of philately (Revised edition.). American Philatelic Society.

Chicago Style (17th ed.) Citation

Williams, L. N. Fundamentals of Philately. Revised edition. State College, Pennsylvania: American Philatelic Society, 1990.

MLA (9th ed.) Citation

Williams, L. N. Fundamentals of Philately. Revised edition. American Philatelic Society, 1990.

Warning: These citations may not always be 100% accurate.