Gaya APA
Schofield, ., Ltd, S. ().
4000 Quizzes on General scince, physics, chemistry and biology .
New Delhi:
Pustak Mahal.
Gaya MLA
Schofield, ., Ltd, Siml.
"4000 Quizzes on General scince, physics, chemistry and biology".
New Delhi:
Pustak Mahal,
.
Textbook.