Abbs, B. (1990). Blueprint one. Longman.
Cita Chicago Style (17a ed.)Abbs, Brian. Blueprint One. England: Longman, 1990.
Cita MLA (9a ed.)Abbs, Brian. Blueprint One. Longman, 1990.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.
Cita APA (7a ed.)