Which is the correct citation when the source is quoted directly and the author's name is not mentioned in the text?

Author and publication year: $($Doe$,2007).$

Author, year, & page number $($preceded by p$.)$: $($Doe$,2007,$ p$.25).$

Author and page number separated by a comma: $($Doe$,25).$

Author and page number without intervening punctuation $($Doe $25).$