Gaya APA

Tillich, P, [. (1973). The boundaries of our being, [preface D.L.Edwards]. Memuat: The eternal now. 1963 The new being. 1956. On the boundary 1967 (bagian pertama dari The interpretation of history 1936) . [London]: Collins.

Gaya MLA

Tillich, Paul., [1886-1965].. "The boundaries of our being, [preface D.L.Edwards]. Memuat: The eternal now. 1963 The new being. 1956. On the boundary 1967 (bagian pertama dari The interpretation of history 1936)". [London]: Collins, 1973. Buku.