@book{1434,
	author = {Sigelman, Carole K.},
	title = {Life-span human development },
	publisher = {Cengage Learning,},
	year = {c2015.},
	address = {Australia:},
	edition = {8th edition.},
	url = {https://books.google.com.pk/books?id=x8IDzQEACAAJ&dq=Life-span+human+development+/+Carol+K.+Sigelman,+Elizabeth+A.+Rider&hl=en&sa=X&ved=2ahUKEwi11ePAt9H0AhUF26QKHckYCy0Q6AF6BAgKEAI}
}