Παραπομπή APA

Shephard, R. J. (1978). Physical activity and aging. Croom Helm.

Παραπομπή Chicago Style

Shephard, Roy J. Physical Activity and Aging. London: Croom Helm, 1978.

Παραπομπή MLA

Shephard, Roy J. Physical Activity and Aging. Croom Helm, 1978.