Cita APA (7a ed.)

Social Science Research Council. USA & Hartup, W. W. (1986). Relationships and development. Erlbaum.

Cita Chicago Style (17a ed.)

Social Science Research Council. USA y Willard W. Hartup. Relationships and Development. Hillsdale, N.J. [u.a.]: Erlbaum, 1986.

Cita MLA (9a ed.)

Social Science Research Council. USA y Willard W. Hartup. Relationships and Development. Erlbaum, 1986.