APA

Sonquist J. A., Dunkelberg W. C. & Dunkelberg W. C. (1977). Survey and opinion research. Englewood Cliffs, N.J. [u.a.]: Prentice-Hall.

Chicago

Sonquist John A, Dunkelberg William Charles and Dunkelberg William Charles. 1977. Survey and opinion research. Englewood Cliffs, N.J. [u.a.]: Prentice-Hall.

Harvard

Sonquist J. A., Dunkelberg W. C. and Dunkelberg W. C. (1977). Survey and opinion research. Englewood Cliffs, N.J. [u.a.]: Prentice-Hall.

MLA

Sonquist John A, Dunkelberg William Charles and Dunkelberg William Charles. Survey and opinion research. Englewood Cliffs, N.J. [u.a.]: Prentice-Hall. 1977.