柏琼 & 许力戈. 保护北极熊. Editorial Department of Chinese Journal of Wildlife.
Chicago Style (17th ed.) Citation柏琼 and 许力戈. 保护北极熊. Editorial Department of Chinese Journal of Wildlife.
MLA (9th ed.) Citation柏琼 and 许力戈. 保护北极熊. Editorial Department of Chinese Journal of Wildlife.
Warning: These citations may not always be 100% accurate.