APA

A.A.V.V, . (2002). Hopkins variations. Pennsylvania: Saint Joseph´s University Press/Fordham University Press.

Chicago

A.A.V.V, . 2002. Hopkins variations. Pennsylvania: Saint Joseph´s University Press/Fordham University Press.

Harvard

A.A.V.V, . (2002). Hopkins variations. Pennsylvania: Saint Joseph´s University Press/Fordham University Press.

MLA

A.A.V.V, . Hopkins variations. Pennsylvania: Saint Joseph´s University Press/Fordham University Press. 2002.