Cita APA

Johnson, M., Strom, M. S., & Facing History and Ourselves National Foundation. (1989). Elements of time: Facing history and ourselves. Facing History and Ourselves.

Citación estilo Chicago

Johnson, Mary, Margot Stern Strom, y Facing History and Ourselves National Foundation. Elements of Time: Facing History and Ourselves. Brookline, Mass: Facing History and Ourselves, 1989.

Cita MLA

Johnson, Mary, et al. Elements of Time: Facing History and Ourselves. Facing History and Ourselves, 1989.