APA Style: Formatting In-text Citations with One Author

WHEN YOU mention the author's in the sentence ...

1. write the author's name and the year of publication using a signal phrase,
2. complete the sentence with punctuation: For example: 
1. Adams (2010) claims that many science teachers are frustrated that their students do not know how to think like a scientist while conducting investigations.

WHEN YOU DO NOT mention the author's name in the sentence

1. write the author's name followed by a comma and the year of publication at the end of the sentence, 
2. enclose the citation in parentheses and complete the sentence with punctuation. For example: 
1. Many science teachers are frustrated that their students do not know how to think like a scientist while conducting investigations (Adams, 2010).

My work is based on the Purdue Online Writing Lab -https://owl.english.purdue.edu/owl/section/2/10/