Gould, S. B., & Cross, K. P. (1972). Explorations in non-traditional study ([1st ed.].). Jossey-Bass.
Cita Chicago (17th ed.)Gould, Samuel B., i K. Patricia Cross. Explorations in Non-traditional Study. [1st ed.]. San Francisco: Jossey-Bass, 1972.
Cita MLA (8th ed.)Gould, Samuel B., i K. Patricia Cross. Explorations in Non-traditional Study. [1st ed.]. Jossey-Bass, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.