Cite Them Right 11th edition - Harvard

Barry Feigenbaum, P. and Barry Feigenbaum, P. (2022) Go for Java Programmers.

Chicago Manual of Style 17th edition (full note)

Barry Feigenbaum, Ph.D, and Ph.D Barry Feigenbaum. Go for Java Programmers.

American Psychological Association 7th edition

Barry Feigenbaum, P., & Barry Feigenbaum, P. (2022). Go for Java Programmers.

Modern Language Association 9th edition

Barry Feigenbaum, P., and P. Barry Feigenbaum. Go for Java Programmers. 2022.

ISO-690 (author-date, Deutsch)

BARRY FEIGENBAUM, Ph.D and Ph.D BARRY FEIGENBAUM, 2022. Go for Java Programmers

Warning: These citations may not always be 100% accurate.