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.

H Hosseini Nejad, "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).