Fitness, E. (1959). Descriptive geometry and drawing for second year, [ graded problems and examples]. The Author.
Chicago-viite (17. p.)Fitness, E.W. Descriptive Geometry and Drawing for Second Year, [ Graded Problems and Examples]. Newcastle, N.S.W.: The Author, 1959.
MLA-viite (8. p.)Fitness, E.W. Descriptive Geometry and Drawing for Second Year, [ Graded Problems and Examples]. The Author, 1959.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.