APA استشهاد

Sidgwick,Henry. (1993). The Methods of ethics. SBW Publishers.

استشهاد بنمط شيكاغو

Sidgwick,Henry. The Methods of Ethics. New Delhi: SBW Publishers, 1993.

MLA استشهاد

Sidgwick,Henry. The Methods of Ethics. SBW Publishers, 1993.