Luff, J. N. (2005). What Philately Teaches A Lecture Delivered before the Section on Philately of the Brooklyn Institute of Arts and Sciences, February 24, 1899. Project Gutenberg.
Chicago Style (17th ed.) CitationLuff, John N. What Philately Teaches A Lecture Delivered Before the Section on Philately of the Brooklyn Institute of Arts and Sciences, February 24, 1899. Project Gutenberg, 2005.
MLA (9th ed.) CitationLuff, John N. What Philately Teaches A Lecture Delivered Before the Section on Philately of the Brooklyn Institute of Arts and Sciences, February 24, 1899. Project Gutenberg, 2005.
Warning: These citations may not always be 100% accurate.