APA-referens (7:e uppl.)

Harper, J. (2000). Solutions to 20 common building problems. BRANZ.

Chicago-referens (17:e uppl.)

Harper, John. Solutions to 20 Common Building Problems. Porirua City, N.Z.: BRANZ, 2000.

MLA-referens (8:e uppl.)

Harper, John. Solutions to 20 Common Building Problems. BRANZ, 2000.