APA

Teilhard de Chardin P., . (1969). Letters to Léontine Zanta. New York: Harper and Row.

Chicago

Teilhard de Chardin Pierre, . 1969. Letters to Léontine Zanta. New York: Harper and Row.

Harvard

Teilhard de Chardin P., . (1969). Letters to Léontine Zanta. New York: Harper and Row.

MLA

Teilhard de Chardin Pierre, . Letters to Léontine Zanta. New York: Harper and Row. 1969.