Bell, R. R. (1981). Worlds of friendship. Sage Publications.
Chicagoスタイル(17版)引用形式Bell, Robert R. Worlds of Friendship. Beverly Hills: Sage Publications, 1981.
MLA(9版)引用形式Bell, Robert R. Worlds of Friendship. Sage Publications, 1981.
警告: この引用は必ずしも正確ではありません.