Hall, A. W. (1889). The problem of human life: Containing the fundamental principles of the substantial philosophy, with a review of the six great modern scientists, Darwin, Tyndall, Huxley, Haeckel, Helmholtz, and Mayer, upon evolution, spontaneous generation, the nature of force, &c., &c ([Rev. ed.].). Hall.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hall, Alexander Wilford. The Problem of Human Life: Containing the Fundamental Principles of the Substantial Philosophy, with a Review of the Six Great Modern Scientists, Darwin, Tyndall, Huxley, Haeckel, Helmholtz, and Mayer, upon Evolution, Spontaneous Generation, the Nature of Force, &c., &c. [Rev. ed.]. New York: Hall, 1889.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hall, Alexander Wilford. The Problem of Human Life: Containing the Fundamental Principles of the Substantial Philosophy, with a Review of the Six Great Modern Scientists, Darwin, Tyndall, Huxley, Haeckel, Helmholtz, and Mayer, upon Evolution, Spontaneous Generation, the Nature of Force, &c., &c. [Rev. ed.]. Hall, 1889.