Citazione Stile APA (7a Edizione)

Levinger, B. (1996). Critical transitions: Human capacity development across the lifespan. Education Development Center.

Citazione stile Chigago Style (17a edizione)

Levinger, Beryl. Critical Transitions: Human Capacity Development Across the Lifespan. Newton, MA: Education Development Center, 1996.

Citatione MLA (9a ed.)

Levinger, Beryl. Critical Transitions: Human Capacity Development Across the Lifespan. Education Development Center, 1996.