Gaya APA
Pierre, T, D, C. (1975).
Toward the future. Transl. by R. Hague. : Les directions de l'avenir. 1973 .
London:
Collind.
Gaya MLA
Pierre, Teilhard, De, Chardin,.
"Toward the future. Transl. by R. Hague. : Les directions de l'avenir. 1973 ".
London:
Collind,
1975.
Buku.