Pence, R. W. (1921). A manual of the mechanics of writing. The Macmillan company.
Citazione stile Chigago Style (17a edizione)Pence, Raymond Woodbury. A Manual of the Mechanics of Writing. New York: The Macmillan company, 1921.
Citatione MLA (9a ed.)Pence, Raymond Woodbury. A Manual of the Mechanics of Writing. The Macmillan company, 1921.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.