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.
Citação norma ChicagoKeenan, 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.
Citação norma MLAKeenan, Marjorie. From Stockholm to Johannesburg: An Historical Overview of the Concern of the Holy See for the Environment; 1972 - 2002. Libreria editrice vaticana, 2002.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.