Cita APA (7th ed.)
DUCKER, P., & MOONEN, X. (1987). THE EFFECT OF TWO PROCEDURES ON SPONTANEOUS SIGNING WITH DOWN'S SYNDROME CHILDREN.
Cita Chicago (17th ed.)
DUCKER, P.C, i X.M MOONEN. THE EFFECT OF TWO PROCEDURES ON SPONTANEOUS SIGNING WITH DOWN'S SYNDROME CHILDREN. 1987.
Cita MLA (9th ed.)
DUCKER, P.C, i X.M MOONEN. THE EFFECT OF TWO PROCEDURES ON SPONTANEOUS SIGNING WITH DOWN'S SYNDROME CHILDREN. 1987.
Atenció: Aquestes cites poden no estar 100% correctes.