Lefkoff, G. (1980). Reading and writing intervals: A self-instruction book. Glyphic Press.
Chicago Style (17th ed.) CitationLefkoff, Gerald. Reading and Writing Intervals: A Self-instruction Book. Morgantown, West Va: Glyphic Press, 1980.
MLA (9th ed.) CitationLefkoff, Gerald. Reading and Writing Intervals: A Self-instruction Book. Glyphic Press, 1980.
Warning: These citations may not always be 100% accurate.