Once again, the parallel citation is to West's California Reporter. Only state supreme court cases are reported in Pacific Reporter hence, no parallel cite to that series. This citation follows the protocal of the Uniform System of Citation style manual by placing the year the case was decided at the end of the citation. In the California Style Manual the year the case was decided is placed between the name of the case and the first reporter citation. The first citation in a string is always to the official citation.
Unofficial citations are no less accurate.
They are just published by private publishers. The unofficial citations are called the parallel citations. For more about citing legal authorities see Basic Legal Citation, An Introduction.