Dyfyniad APA

Handy, R., Harwood, E. C., Dewey, J., & Ratner, J. (1973). Useful procedures of inquiry. Behavioral Research Council.

Dyfyniad Arddull Chicago

Handy, Rollo, Edward Crosby Harwood, John Dewey, and Joseph Ratner. Useful Procedures of Inquiry. Great Barrington, Massachusetts: Behavioral Research Council, 1973.

Dyfyniad MLA

Handy, Rollo, et al. Useful Procedures of Inquiry. Behavioral Research Council, 1973.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.