Mumford, B. (1969). 15 Steps out. Logos international.
芝加哥风格引文Mumford, Bob. 15 Steps Out. Plainfield,NJ: Logos international, 1969.
MLA引文Mumford, Bob. 15 Steps Out. Logos international, 1969.
警告：这些引文格式不一定是100％准确.
APA引文
Mumford, B. (1969). 15 Steps out. Logos international.
芝加哥风格引文Mumford, Bob. 15 Steps Out. Plainfield,NJ: Logos international, 1969.
MLA引文Mumford, Bob. 15 Steps Out. Logos international, 1969.