Kaplan. (1998). Lecture Companion Guide Step 2. s.n.
芝加哥风格引文Kaplan. Lecture Companion Guide Step 2. Washington, D.C: s.n, 1998.
MLA引文Kaplan. Lecture Companion Guide Step 2. s.n, 1998.
警告:这些引文格式不一定是100%准确.
Kaplan. (1998). Lecture Companion Guide Step 2. s.n.
芝加哥风格引文Kaplan. Lecture Companion Guide Step 2. Washington, D.C: s.n, 1998.
MLA引文Kaplan. Lecture Companion Guide Step 2. s.n, 1998.