Cita APA

Rider, W. D. (1989). Why are some specialties so unpopular?

Chicago Style Citation

Rider, Walter D. Why Are Some Specialties so Unpopular? 1989.

Cita MLA

Rider, Walter D. Why Are Some Specialties so Unpopular? 1989.

Atenció: Aquestes cites poden no estar 100% correctes.