BRIEN , D. O. (1994). CADBURY BOURNVITA'S BOOK OF KNOWLEDGE 2.
Cita Chicago (17th ed.)BRIEN , DEREK O. CADBURY BOURNVITA'S BOOK OF KNOWLEDGE 2. 1994.
Cita MLA (9th ed.)BRIEN , DEREK O. CADBURY BOURNVITA'S BOOK OF KNOWLEDGE 2. 1994.
Atenció: Aquestes cites poden no estar 100% correctes.