APA সাইটেশন

SHROCK,Robert.R. (1953). PRINCIPLES OF INVERTEBRATE PALEONTOLOGY. McGRAW-HILL BOOK COMPANY.

শিকাগো স্টাইলে সাইটেশন

SHROCK,Robert.R. PRINCIPLES OF INVERTEBRATE PALEONTOLOGY. NEW YORK: McGRAW-HILL BOOK COMPANY, 1953.

এমএলএ সাইটেশন

SHROCK,Robert.R. PRINCIPLES OF INVERTEBRATE PALEONTOLOGY. McGRAW-HILL BOOK COMPANY, 1953.