365746 Penna, C. V. (1970). The planning of library and documentation services. Unesco.
芝加哥风格引文365746 Penna, C. V. The Planning of Library and Documentation Services. Unesco, 1970.
MLA引文365746 Penna, C. V. The Planning of Library and Documentation Services. Unesco, 1970.
警告：这些引文格式不一定是100％准确.