Keenan, M. (2002). From Stockholm to Johannesburg: An historical overview of the concern of the Holy See for the environment; 1972 - 2002. Libreria editrice vaticana.
Chicago Style (17th ed.) CitationKeenan, Marjorie. From Stockholm to Johannesburg: An Historical Overview of the Concern of the Holy See for the Environment; 1972 - 2002. Vatican city: Libreria editrice vaticana, 2002.
MLA引文Keenan, Marjorie. From Stockholm to Johannesburg: An Historical Overview of the Concern of the Holy See for the Environment; 1972 - 2002. Libreria editrice vaticana, 2002.
警告：這些引文格式不一定是100％准確.