توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Ledesma, A. L., & Osner, K. (1988). Ways and steps towards solidarity: Experiences and impetus from a German-Philippine exposure and dialogue program. German Commission Justitia et Pax.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Ledesma, Antonio L., و Karl Osner. Ways and Steps Towards Solidarity: Experiences and Impetus from a German-Philippine Exposure and Dialogue Program. Bonn: German Commission Justitia et Pax, 1988.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Ledesma, Antonio L., و Karl Osner. Ways and Steps Towards Solidarity: Experiences and Impetus from a German-Philippine Exposure and Dialogue Program. German Commission Justitia et Pax, 1988.