Alison Hawes. PYP L1 Elephant Walk single (Pearson Baccalaureate PrimaryYears Programme). Heinemann.
芝加哥风格引文Alison Hawes. PYP L1 Elephant Walk Single (Pearson Baccalaureate PrimaryYears Programme). Heinemann.
MLA引文Alison Hawes. PYP L1 Elephant Walk Single (Pearson Baccalaureate PrimaryYears Programme). Heinemann.
警告：这些引文格式不一定是100％准确.