Cita APA (7a ed.)

Lloyd, P., & Fernyhough, C. (1999). Lev Vygotsky: Critical assessments. Routledge.

Cita Chicago Style (17a ed.)

Lloyd, Peter, y Charles Fernyhough. Lev Vygotsky: Critical Assessments. London [etc.]: Routledge, 1999.

Cita MLA (9a ed.)

Lloyd, Peter, y Charles Fernyhough. Lev Vygotsky: Critical Assessments. Routledge, 1999.