Gaya APA
Shrock, Robert R.. (1953).
Principles of invertebrate paleontology / Robert R. Shrock, William H. Twenhofel .
:
New York: McGraw-Hill Book.
Gaya Chicago
Shrock, Robert R..
Principles of invertebrate paleontology / Robert R. Shrock, William H. Twenhofel.
:
New York: McGraw-Hill Book,
1953.
Buku.
Gaya MLA
Shrock, Robert R..
Principles of invertebrate paleontology / Robert R. Shrock, William H. Twenhofel.
:
New York: McGraw-Hill Book,
1953.
Buku.
Gaya Turabian
Shrock, Robert R..
Principles of invertebrate paleontology / Robert R. Shrock, William H. Twenhofel.
:
New York: McGraw-Hill Book,
1953.
Buku.