APA (7th ed.) Citation

Williams, L. N., & Williams, M. (1969). Techniques of philately / by L.N. Williams and M. Williams. Heinemann.

Chicago Style (17th ed.) Citation

Williams, L. N., and M. Williams. Techniques of Philately / by L.N. Williams and M. Williams. Heinemann, 1969.

MLA (9th ed.) Citation

Williams, L. N., and M. Williams. Techniques of Philately / by L.N. Williams and M. Williams. Heinemann, 1969.

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