Cita APA (7th ed.)
BLOCK, S., & DUFFY, S. (1998). A PASSPORT FOR IMPROVING SERVICES TO INDIVIDUALS WITH DEVELOPMENTAL DISABILITIES.
Cita Chicago (17th ed.)
BLOCK, S., i S. DUFFY. A PASSPORT FOR IMPROVING SERVICES TO INDIVIDUALS WITH DEVELOPMENTAL DISABILITIES. 1998.
Cita MLA (9th ed.)
BLOCK, S., i S. DUFFY. A PASSPORT FOR IMPROVING SERVICES TO INDIVIDUALS WITH DEVELOPMENTAL DISABILITIES. 1998.
Atenció: Aquestes cites poden no estar 100% correctes.