Citazione APA

Marcus, S. P., & Haeckel, E. (1910). What is this universe?: Christian faith versus monist dreams. Funk and Wagnalls company.

Stile di citazione Chicago

Marcus, Sigismund Philipp, e Ernst Haeckel. What Is This Universe?: Christian Faith Versus Monist Dreams. London, New York: Funk and Wagnalls company, 1910.

Citazione MLA

Marcus, Sigismund Philipp, e Ernst Haeckel. What Is This Universe?: Christian Faith Versus Monist Dreams. Funk and Wagnalls company, 1910.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.