BRITANNICA. (2016). PHONICS WORKBOOK - BRITANNICA'S EARLY STEPS - NURSERY. ENCYCLOPEDIA BRITANNICA.
芝加哥风格引文BRITANNICA. PHONICS WORKBOOK - BRITANNICA'S EARLY STEPS - NURSERY. NEW DELHI: ENCYCLOPEDIA BRITANNICA, 2016.
MLA引文BRITANNICA. PHONICS WORKBOOK - BRITANNICA'S EARLY STEPS - NURSERY. ENCYCLOPEDIA BRITANNICA, 2016.
警告：这些引文格式不一定是100％准确.