Cita APA (7a ed.)
Yell Group Ltd. MarketLine Company Profile. Marketline.
Cita Chicago Style (17a ed.)
Yell Group Ltd. MarketLine Company Profile. Marketline.
Cita MLA (9a ed.)
Yell Group Ltd. MarketLine Company Profile. Marketline.
警告：這些引文格式不一定是100％准確.