Piper, A. G. (1991). Book-keeping (2a. ed.). Hodder & Stoughton.
Chicago Style (17th ed.) CitationPiper, A. G. Book-keeping. 2a. ed. Londres: Hodder & Stoughton, 1991.
MLA (9th ed.) CitationPiper, A. G. Book-keeping. 2a. ed. Hodder & Stoughton, 1991.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.