APA-referens (7:e uppl.)

Read, L. E. (1975). Castles in the air. Foundation for Economic Education.

Chicago-referens (17:e uppl.)

Read, Leonard Edward. Castles in the Air. Irvington-on-Hudson, N.Y.: Foundation for Economic Education, 1975.

MLA-referens (8:e uppl.)

Read, Leonard Edward. Castles in the Air. Foundation for Economic Education, 1975.