Cita APA (7a ed.)

Downey, D. B., Powell, B., Steelman, L. C., & Pribesh, S. (1999). Much ado about siblings: Change models, sibship size, and intellectual development. American sociological review, 64(2), 193-198.

Cita Chicago Style (17a ed.)

Downey, Douglas B., Brian Powell, Lala Carr Steelman, y Shana Pribesh. "Much Ado About Siblings: Change Models, Sibship Size, and Intellectual Development." American Sociological Review 64, no. 2 (1999): 193-198.

Cita MLA (8a ed.)

Downey, Douglas B., et al. "Much Ado About Siblings: Change Models, Sibship Size, and Intellectual Development." American Sociological Review, vol. 64, no. 2, 1999, pp. 193-198.