National Beautification and Cleanliness Committee. Contest Committee. (1968). National beautification and cleanliness campaign: Landscaping ideas for plazas and parks. [Lay-out by National Media Production Center. Bureau of Print.].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Beautification and Cleanliness Committee. Contest Committee. National Beautification and Cleanliness Campaign: Landscaping Ideas for Plazas and Parks. [Lay-out by National Media Production Center. Manila: Bureau of Print.], 1968.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Beautification and Cleanliness Committee. Contest Committee. National Beautification and Cleanliness Campaign: Landscaping Ideas for Plazas and Parks. [Lay-out by National Media Production Center. Bureau of Print.], 1968.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.