Enrile, J. P. Speech of Defense Secretary Juan Ponce Enrile at the Oath-taking Ceremonies for successful examinees of the Board of Examinations for Mechanical Engineers, sponsored by the Philippine Society of Mechanical Engineers, Manila Hotel, February 25, 1973.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Enrile, Juan Ponce. Speech of Defense Secretary Juan Ponce Enrile at the Oath-taking Ceremonies for Successful Examinees of the Board of Examinations for Mechanical Engineers, Sponsored by the Philippine Society of Mechanical Engineers, Manila Hotel, February 25, 1973.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Enrile, Juan Ponce. Speech of Defense Secretary Juan Ponce Enrile at the Oath-taking Ceremonies for Successful Examinees of the Board of Examinations for Mechanical Engineers, Sponsored by the Philippine Society of Mechanical Engineers, Manila Hotel, February 25, 1973.