Hosseini Nejad, H. (1990). Introduction to the book of science of principles. Legal Research Quarterly, 1(8), 271–281.

Hosseini Nejad, H. "Introduction to the book of science of principles", Legal Research Quarterly, 1, 8, 1990, 271–281.

Hosseini Nejad, H. (1990). 'Introduction to the book of science of principles', Legal Research Quarterly, 1(8), pp. 271–281.

Hosseini Nejad, H., "Introduction to the book of science of principles." Legal Research Quarterly, 1 8 (1990): 271–281,

Hosseini Nejad H. Introduction to the book of science of principles. Leg Res Q. 1990;1(8):271–281 (In Persian).