Shell Company of the Philippines, Ltd. (1961). Survey of activities, 1961 [of the] Shell Companies in the Philippines: The Shell Co. of the Philippines Ltd., The Shell Refining Co. (Phil) Inc., [and] The Shell Chemical Co. (Phil) Inc. s.n.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Shell Company of the Philippines, Ltd. Survey of Activities, 1961 [of the] Shell Companies in the Philippines: The Shell Co. of the Philippines Ltd., The Shell Refining Co. (Phil) Inc., [and] The Shell Chemical Co. (Phil) Inc. [Manila: s.n, 1961.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Shell Company of the Philippines, Ltd. Survey of Activities, 1961 [of the] Shell Companies in the Philippines: The Shell Co. of the Philippines Ltd., The Shell Refining Co. (Phil) Inc., [and] The Shell Chemical Co. (Phil) Inc. s.n, 1961.